16-5 Quality of Transport Routes
Item	1990	1995	2000	2008	2009
Length of National Railways in Operation (km)	53378	54616	58656	63975	65491
Double-Tracking Length                             (km)	13024	16909	21408	26599	28682
Proportion                                                     (%)	24.4	31.0	36.5	41.6	43.8
Automatic Blocking Length                        (km)	10370	12910	18318	28100	31619
Length of Highways                                     (km)	1028348	1157009	1402698	3730164	3860823
Expressway and Class I to IV Highways     (km)	741040	910754	1216013	2778521	3056265
Proportion                                                    (%)	72.1	78.7	86.7	74.5	79.2
Length of Navigable Inland Waterways    (km)	109192	110562	119325	122763	123683
Standard Waterways                                   (km)		56587	61367	61093	61546
Proportion                                                    (%)		51.2	51.4	49.8	49.8